CVE-2023-30934 in SC9863A
Summary
by MITRE • 07/12/2023
In telephony service, there is a missing permission check. This could lead to local information disclosure with no additional execution privileges needed.
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Analysis
by VulDB Data Team • 07/30/2023
The vulnerability identified as CVE-2023-30934 represents a critical security flaw within telephony service implementations where a missing permission check allows unauthorized local information disclosure. This issue resides in the core telephony service component that manages voice calls, SMS messaging, and other communication functions on mobile devices and telephony systems. The vulnerability stems from inadequate access control mechanisms that fail to properly validate user permissions before granting access to sensitive telephony data. According to CWE-284, this manifests as an improper access control weakness where the system lacks proper authorization checks, allowing any local process or user to access restricted telephony information without requiring additional privileges or execution rights. The telephony service typically operates with elevated privileges to manage communication functions, making it a prime target for information disclosure attacks.
The technical implementation of this vulnerability occurs when the telephony service fails to perform proper permission validation before exposing sensitive data structures or communication channels. Attackers can exploit this by leveraging local processes that have basic system access to query telephony service interfaces directly, bypassing normal authorization protocols. The service may expose APIs or data structures that contain call logs, contact information, message contents, or network configuration details without verifying whether the requesting process has legitimate authorization to access such information. This flaw operates at the system level where local applications can interact with telephony service components through inter-process communication mechanisms or direct service interfaces, making the attack surface particularly broad and accessible.
The operational impact of CVE-2023-30934 extends beyond simple information disclosure to potentially compromise user privacy and system integrity. Local information disclosure can expose sensitive personal data including call histories, contact lists, text messages, and potentially device identification information that could be used for further attacks. The lack of additional execution privileges required makes this vulnerability particularly dangerous as it can be exploited by malware or malicious applications already present on the device. This vulnerability aligns with ATT&CK technique T1083 which involves discovering system information, and T1005 which covers data from local system. The exposure of telephony data could enable attackers to build detailed profiles of users, track communication patterns, or extract information useful for social engineering attacks. Organizations using affected telephony services may experience privacy violations, regulatory compliance issues, and potential legal consequences from unauthorized data access.
Mitigation strategies for CVE-2023-30934 should focus on implementing proper permission validation mechanisms within telephony service implementations. System administrators and developers must ensure that all telephony service interfaces perform rigorous access control checks before returning sensitive information. This includes implementing proper authentication and authorization protocols that validate the requesting process against established permission policies. The fix typically involves adding comprehensive permission checks at service entry points, ensuring that only authorized applications or processes can access telephony data. Organizations should also implement regular security audits of telephony service components, monitor for unauthorized access attempts, and maintain up-to-date security patches. According to industry best practices for mobile security frameworks, proper sandboxing and privilege separation should be enforced to prevent unauthorized access to sensitive system components. Additionally, implementing logging and monitoring for telephony service access can help detect and respond to exploitation attempts while maintaining compliance with privacy regulations such as GDPR or CCPA that govern the handling of personal communication data.